Oscillator



Juy A20 19266 l 1,592,901

R. s. OHL

OSCILLATOR Filed May 2:5, 1924 Gate/afar Wwe Jwmynavmhmw INVENTO? ATTORNEY Patented July 20, 1926.

UNITED srAras .Partnr erica.

RUSSELL S. OHL, OF .NEW YORK, N. Y., ASSIGNQR T AMERCAN TELEPHONE AND TELEGRAPH COMANY, A CORORATION 0F NEW YORK.

OSCILLATOR.

Application led May 23, 1924. Serial No. 715,437.

This invention relates to arrangements for producing high frequency oscillation such. for example, as oscillations suitable for radio or carrier purposes.

The essential features of the invention consist in associating with a generator of relatively low frequency oscillations of a transfori'ner device arranged to produce harmonies of the original wave. There is also associated with the transformer device ar rangements whereby a sharp cut-off characteristic will be produced in the wave form produced in the secondary winding of the transformer. rlhe secondary winding 'of the transformer is coupled to a circuit tuned to any frequency which is a multiple of the original frequency generated. The sharp cut-off characteristic in the wave produced in the secondary winding of the transformer will produce shock excitation in the tuned circuit. rlhis shock excitation will result in the production of a train of waves of relatively much higher frequency than the generated wave. Other features and details of the invention will appear more fully from the following description.

The invention may now be more fully understood from the` following description, together with the accompanying drawing7 in Figures l, 2, 3, l and of which the invention is illustrated. Fig. 1 shows a circuit diagram embodying the arrangements of the invention, while Figs. 2, 8, 4 and 5 show curves illustrating the various wave forms utilized in the invention.

In Fig. 1 is shown a line associated with a motor M. The motor M operates a generator G, which generates a sine wave such as is shown by the curve of Fig. 2. Associated with the generator is a transformer would cause the wave produced in the secondary to be somewhat distorted. This form of wave is illustrated by the curve of Fig. 13. Then the winding R and the feedbach condenser E are associated with the transformer T, a sharp cut-0H characteristie results in the voltage of the secondary winding. Accordingly, the wave form produced in the secondary Winding will take the form shown by the curve ofFig. 4. It is pointed out that this curve has a sharp cutoff cha acteristic or drop such as is illustrated by X. The secondary winding S is loosely coupled through the condenser B to the circuit CL. T he circuit CL includes the inductance and variable condenser C whereby it may be tuned to be resonant at fre` quencies which are multiples of the frequency genera-ted by G. The sharp cut-off characteristic of the secondary wave from the transformer will produce a shock excita tion on the circuit CL. This will result in the production of a train of oscillations which will take the form illustrated by the curve of Fig. 5. These trains of oscillations will be a multiple of the frequency of the wave originally generated by the generato-r G and will be of a much greater frequency. These high frequency waves may either be transmitted out over an antenna circuit A or over a carrier system, as desired.

lVhile the invention has been disclosed in certain specific arrangements which are deemed desirable it is understood that it is capable of embodiment in many. other and widely varied forms withoutdeparting from the spirit of the invention as defined in the appended claims.

lVhat is claimed iszl. A circuit for generating high frequency oscillations comprising a generator of relatively low frequency oscillations, a harmonic producing transformer having primary and secondary windings. the primary winding of said transformer being connected to said generator, a circuit tuned to a frequency which is a multiple of said relatively low generated frequency, means for coupling the secondary winding of said transformer with said circuit and means associated with said transformer for producing a sharp cut-off characteristic in the wave form produced in the. secondary whereby shock excitation may result in said tuned circuit.

il. A circuit for generating high frequency oscillations comprising a generator of relatively low frequency oscillations, a harmonic producing transformer having primary and secondary windings, a circ-uit tuned to a frequency which is a multiple of said relatively 10W generated frequency, Said primar)v 'hiding of said transformer being associated with smid generator and Suid seemidary Winding being' coupled through a condenfaer to said tuned circuit', and a. third. Winding on Said transformer iii Series 'with n, condenser 'for producing :i sharp cutoff ehm'zictel'istii' in the Wave form produced, in the Secondary whereby shock excitmion uw. f result in said timed circuit. l0

In testimony whereof, I have Signed my name 'Lio this specification this 21st day 01 Mny, w24,

RUSSELL om. 

